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DevOps means a concept to bring Development team and operation team together. So that you can speed up the deployment process. Before you start learning the tools you need to understand core principles. The useful DevOps Principles to know for your project and interviewsTo deliver rapidly without affecting qualityCommunication and Collaboration are the key ideas in DevOps conceptMultiple deploys are possible- if code in Development team automatedOnce you commit the repository, it tests the code automatically against the automated test scriptsIf Build is successfully passed, it installs automatically in Testing environment When infrastructure is automated, it installs automatically to other serversMinor changes takes place in isolation, that means , it creates separate server to deploy minor changesSpeed in Devops, organizations to better serve their customers and compete more effectively in the market.Quality and Security teams are part of DevOpsAutomating the process, much better pro…

Elastic cloud computing amazon

The short name for Amazon Elastic Computing Cloud is EC2. You can keep this point as an interview question. The computing capacity has an elastic property. Based on your requirement you can increase or decrease computing power. I am giving in this AWS EC2 real story for your quick reference.

You need to be very attentive when you enable Auto scaling feature. It is a responsibility on Admins.

Amazon AWS EC2

Making your existing hardware to the requirement, always is not so easy. So the EC2 feature in AWS helps you to allocate computing power according to your needs.

AWS EC2 instance acts as your physical server.

It has memory.

You can increase the instance size in terms of CPU, Memory, Storage and GPU.

EC2 auto scaling is a property, where it automatically increase your computing power.

List of Top Security Features in EC2

1#. Virtual Private Cloud

The responsibility of Virtual Private Cloud, is to safeguard each instance separately. That means, you cannot access others instance, which is already created by other organization.

2#. Network Access Control List

It acts as firewall to both incoming and outgoing requests.

3#. Access Management

Control level of access granted to each user.

4#. Security Groups

Each instance can have 5 security groups. It acts as firewall. It is something more detailed over Network Access Control List.

5#. Hardware Security Device

A security device, to control security between on-premise network hardware and AWS cloud hardware.

References

AWS EC2 Instance

Instance is one server of virtual in nature created on be half of an organization on AWS cloud. You can find different AWS instances. Those are A1, T3, T2, M5, M5a, M4 etc.

Instance type means, it has different combinations of computing power.

AWS EC2 CLI

There are different methods to start AWS EC2

AWS management console

CLI

AWS SDKS

AWS Security Group

Each Security group associated with an instance. You can create a security group and define rules for that depending on requirement.How to learn about AWS EC2 is a big question for many developers. Some people read AWS EC2 tutorials, and some people learn by good AWS books. The best option is first create one AWS free account and use your tutorials and books to elaborate more and to get more hands-on.

AWS Top Instance Types According to wiki

General Purpose: M5, M4, T2

Compute Optimized: C5, C4

Memory Optimized: X1e, X1, R4

Accelerated Computing: P3, P2, G3, F1

Storage Optimized: H1, I3, D2

To understand more on EC2 instance types, I prefer to read this article.

Frequently Asked Questions on EC2

1) When does EC2 introduced?

A) 2006

2) Does EC2 has a graphical user interface?

A) Yes, it has.

3). What are real applications of EC2?

A) It is scalable and faster Docker container management features.

4). What is an instance?

A). Virtual computing power you can say as instance.

5). What is an AMI?

A) This is a pre-configured template to use on an instance. 6). What is AWS Lambda?
A). This is a compute service that runs code without the need to provision or manage servers.

7). What is AWS Elastic BeaStalk?

A). This is a service that enables you to quickly deploy and manage applications on the AWS Cloud without worrying about the infrastructure that runs those applications

8). What is Amazon Light Sail?

A). This service is for developers who need virtual private servers. Amazon Lightsail includes everything you need to launch your project quickly—a virtual machine, SSD-based storage, data transfer, Domain Name System (DNS) management, and a static IP address—for a low, predictable price.

9). What is AWS Batch?

A). This service enables you to run batch computing workloads on the AWS Cloud. Batch computing is a common way for developers, scientists, and engineers to access large amounts of compute resources

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I am practicing Hyperledger. This is one of the top listed blockchains. This architecture follows R3 Corda specifications. Sharing the interview questions with you that I have prepared for my interview.

Though Ethereum leads in the real-time applications. The latest Hyperledger version is now ready for production applications. It has now become stable for production applications.The Hyperledger now backed by IBM. But, it is still an open source. These interview questions help you to read quickly.
The below set of interview questions help you like a tutorial on Hyperledger fabric.
Hyperledger Fabric Interview Questions1). What are Nodes?
In Hyperledger the communication entities are called Nodes.

2). What are the three different types of Nodes?
- Client Node
- Peer Node
- Order Node
The Client node initiates transactions. The peer node commits the transaction. The order node guarantees the delivery.

3). What is Channel?
A channel in Hyperledger is the subnet of the main blockchain. You c…